Installation Procedure.

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Remove any dirt or debris from the support bushing bore.
Position the rear support bushing in the bore.

Fig 1: View of DT-48060-A

Courtesy of GENERAL MOTORS CORP.

Using the DT-48060-A , install the rear support bushing in the differential housing. See Special Tools .
Install the rear differential assembly. Refer to Differential Replacement .
Remove the support and lower the vehicle.